Patents by Inventor Sumika Iwamoto

Sumika Iwamoto has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Intravascular indwelling catheter lock solution containing weak acid and container containing the same
    Patent number: 8703739
    Abstract: A catheter lock solution which is a catheter lock preparation having a bacteriostatic property at physiological osmotic pressure without practically containing a bacteriostatic component such as a preservative, an antimicrobial agent, or an antibiotic and having high safety, characterized in that the preparation contains a weak acid having an acid dissociation constant (pKa) of 3.0 to 6.5 as a buffer, a pH of the solution is less than 6.0, preferably from 3.0 to about 5.5, an osmotic pressure ratio is from 0.5 to 3.0, and a pH change (variation) can be suppressed to less than the 6.0 with the weak acid, and a container containing the catheter lock solution.
    Type: Grant
    Filed: December 5, 2008
    Date of Patent: April 22, 2014
    Assignee: JMS Co., Ltd.
    Inventors: Yuko Kimura, Koji Suzuki, Minoru Iwata, Sumika Iwamoto, Takashi Yamamoto
  • INTRAVASCULAR INDWELLING CATHETER LOCK SOLUTION CONTAINING WEAK ACID AND CONTAINER CONTAINING THE SAME
    Publication number: 20110315583
    Abstract: A catheter lock solution which is a catheter lock preparation having a bacteriostatic property at physiological osmotic pressure without practically containing a bacteriostatic component such as a preservative, an antimicrobial agent, or an antibiotic and having high safety, characterized in that the preparation contains a weak acid having an acid dissociation constant (pKa) of 3.0 to 6.5 as a buffer, a pH of the solution is less than 6.0, preferably from 3.0 to about 5.5, an osmotic pressure ratio is from 0.5 to 3.0, and a pH change (variation) can be suppressed to less than the 6.0 with the weak acid, and a container containing the catheter lock solution.
    Type: Application
    Filed: December 5, 2008
    Publication date: December 29, 2011
    Applicant: JMS CO., LTD.
    Inventors: Yuko Kimura, Koji Suzuki, Minoru Iwata, Sumika Iwamoto, Takashi Yamamoto